  <!-- Navbar -->
  <nav class="main-header navbar navbar-expand navbar-white navbar-light">
    <!-- Left navbar links -->
    <ul class="navbar-nav">
      <li class="nav-item">
        <a class="nav-link" data-widget="pushmenu" href="#" role="button"><i class="fas fa-bars"></i></a>
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      <li class="nav-item d-none d-sm-inline-block">
        <a href="/" class="nav-link">主页</a>
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<!--      <li class="nav-item d-none d-sm-inline-block">-->
<!--        <a href="#" class="nav-link">Contact</a>-->
<!--      </li>-->
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    <!-- SEARCH FORM -->
    <form class="form-inline ml-3">
      <div class="input-group input-group-sm">
        <input class="form-control form-control-navbar" type="search" placeholder="Search" aria-label="Search">
        <div class="input-group-append">
          <button class="btn btn-navbar" type="submit">
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    <!-- Right navbar links -->
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<!--      &lt;!&ndash; Messages Dropdown Menu &ndash;&gt;-->
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<!--        <a class="nav-link" data-toggle="dropdown" href="#">-->
<!--          <i class="far fa-comments"></i>-->
<!--          <span class="badge badge-danger navbar-badge">3</span>-->
<!--        </a>-->
<!--        <div class="dropdown-menu dropdown-menu-lg dropdown-menu-right">-->
<!--          <a href="#" class="dropdown-item">-->
<!--            &lt;!&ndash; Message Start &ndash;&gt;-->
<!--            <div class="media">-->
<!--              <img src="/static/assets/img/user1-128x128.jpg" alt="User Avatar" class="img-size-50 mr-3 img-circle">-->
<!--              <div class="media-body">-->
<!--                <h3 class="dropdown-item-title">-->
<!--                  Brad Diesel-->
<!--                  <span class="float-right text-sm text-danger"><i class="fas fa-star"></i></span>-->
<!--                </h3>-->
<!--                <p class="text-sm">Call me whenever you can...</p>-->
<!--                <p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>-->
<!--              </div>-->
<!--            </div>-->
<!--            &lt;!&ndash; Message End &ndash;&gt;-->
<!--          </a>-->
<!--          <div class="dropdown-divider"></div>-->
<!--          <a href="#" class="dropdown-item">-->
<!--            &lt;!&ndash; Message Start &ndash;&gt;-->
<!--            <div class="media">-->
<!--              <img src="/static/assets/img/user8-128x128.jpg" alt="User Avatar" class="img-size-50 img-circle mr-3">-->
<!--              <div class="media-body">-->
<!--                <h3 class="dropdown-item-title">-->
<!--                  John Pierce-->
<!--                  <span class="float-right text-sm text-muted"><i class="fas fa-star"></i></span>-->
<!--                </h3>-->
<!--                <p class="text-sm">I got your message bro</p>-->
<!--                <p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>-->
<!--              </div>-->
<!--            </div>-->
<!--            &lt;!&ndash; Message End &ndash;&gt;-->
<!--          </a>-->
<!--          <div class="dropdown-divider"></div>-->
<!--          <a href="#" class="dropdown-item">-->
<!--            &lt;!&ndash; Message Start &ndash;&gt;-->
<!--            <div class="media">-->
<!--              <img src="/static/assets/img/user3-128x128.jpg" alt="User Avatar" class="img-size-50 img-circle mr-3">-->
<!--              <div class="media-body">-->
<!--                <h3 class="dropdown-item-title">-->
<!--                  Nora Silvester-->
<!--                  <span class="float-right text-sm text-warning"><i class="fas fa-star"></i></span>-->
<!--                </h3>-->
<!--                <p class="text-sm">The subject goes here</p>-->
<!--                <p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>-->
<!--              </div>-->
<!--            </div>-->
<!--            &lt;!&ndash; Message End &ndash;&gt;-->
<!--          </a>-->
<!--          <div class="dropdown-divider"></div>-->
<!--          <a href="#" class="dropdown-item dropdown-footer">See All Messages</a>-->
<!--        </div>-->
<!--      </li>-->
<!--      &lt;!&ndash; Notifications Dropdown Menu &ndash;&gt;-->
<!--      <li class="nav-item dropdown">-->
<!--        <a class="nav-link" data-toggle="dropdown" href="#">-->
<!--          <i class="far fa-bell"></i>-->
<!--          <span class="badge badge-warning navbar-badge">15</span>-->
<!--        </a>-->
<!--        <div class="dropdown-menu dropdown-menu-lg dropdown-menu-right">-->
<!--          <span class="dropdown-item dropdown-header">15 Notifications</span>-->
<!--          <div class="dropdown-divider"></div>-->
<!--          <a href="#" class="dropdown-item">-->
<!--            <i class="fas fa-envelope mr-2"></i> 4 new messages-->
<!--            <span class="float-right text-muted text-sm">3 mins</span>-->
<!--          </a>-->
<!--          <div class="dropdown-divider"></div>-->
<!--          <a href="#" class="dropdown-item">-->
<!--            <i class="fas fa-users mr-2"></i> 8 friend requests-->
<!--            <span class="float-right text-muted text-sm">12 hours</span>-->
<!--          </a>-->
<!--          <div class="dropdown-divider"></div>-->
<!--          <a href="#" class="dropdown-item">-->
<!--            <i class="fas fa-file mr-2"></i> 3 new reports-->
<!--            <span class="float-right text-muted text-sm">2 days</span>-->
<!--          </a>-->
<!--          <div class="dropdown-divider"></div>-->
<!--          <a href="#" class="dropdown-item dropdown-footer">See All Notifications</a>-->
<!--        </div>-->
<!--      </li>-->
<!--      <li class="nav-item">-->
<!--        <a class="nav-link" data-widget="control-sidebar" data-slide="true" href="#" role="button">-->
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  </nav>
  <!-- /.navbar -->
